Feed-roller construction.



'N "mm" A Vf T. A. COLEMAN.

FEED ROLLER CONSTRUCTION.. APPLICATION F|LEn.ocT. 2s. |915.

1,241,925. Patented oet. 2,1917.

Athat the teeth therein have two corners or points, one in the plane ofeach side face of the bar.

lntermediate the movable carriers l are movable clamping collars 7having their ments.

opposite faces undercut so as to extend over the `beveled ends of thecarriers and the sloping extremities of the engaging ele- These clampingcollars, like the n carriers, are freely movable both longitudi nallyand circumferentially on the shaft, so that pressure may be transmittedthrough them from engaging elements on one carrier to `engaging elementson the others.

y The terminal clamping collars 2 are underout en one side in a fashionsimilar to the clamping collars 7 so as to engage the outer ends of theterminal carriers and the engag. ing elements thereon. r@ne of theclamping collars 2 is designed to form a iixed abutment, and hence maybefixed to the shaft, but one of said collars must be movablelongitudinally on the shaft, as by virtue 'of its screw thread mounting,so that it may be moved into and out of engagement with the adjacentcarrier and engaging elements.

`With the carriers and clamping collars disposed on the shaftyasdescribed, and the engaging elements disposed in the grooves or seats ofthe carriers, the movable terminal4 collar 2 may be moved toward theother terminal collar, forcing the juxtaposed engaging elements,carriers and clamping collars into engagement seriet/m longitudinally ofthe shaft, whereby the overhanging peripheral portions of the clampingcollars are caused to engage over the ends of the engaging elements andforce and clamp them securely into the seats, due to the sloping orinclined form of their contacting parts. lWhen in their proper relativepositions, the terminal .clamping collars, operating by the pressure orcompression exerted through the engaging elements and interspacedclamping collars, serve to hold the carriers and clamping collarssecurely on the shaft for rotation therewith, and the engaging elementsrmly and securely seated in the carriers.

`With the engaging elements thus seated in the carriers, as is seen inFig. 2, the tooth points along one side of a bar or engaging elementwill be vfarther from the shaft than the tooth points along the otherside of a bar. This, of co rse, is due to the non-radial position of thebars in the carriers. In operation, the roller is rotated in thedirection of pitch of the engaging elements, which is the directionindicated hy the arrow in Fig. A s the lumber represented by L, Fig. 2,is fed to the roller, it is engaged by the outer series of tooth pointsof the engaging elements, which afford a purchase on the lumber wherebythe movement necessary to feed it forward to the saws may be transmittedfromv the revolving roller. lt

will be seen that in this operation, the thrust and reaction exertedagainst the engaging elements are exerted in the line of the engagingelements and not across them as it is in instances where they aredisposed radially in the carriers. This brings the thrust through themaximum width of the material in the engaging elements and against thebottoms of the seats in which they are secured. By virtue of thisarrangement, the possibility of distorting or bending vthe toothed barsis greatly decreased.

ills it will be seen how in this operation the points or corners alongonly one side of a bar will be brought into operative engagement withthe lumber, it is obvious that'wear on an engaging element will beconfined to one side of the bar. Vihen the engaging elements become soworn on one side as to lose their efiiciency, they may be reversed intheir seats by loosening up the movable terminal clamping collar, movingthe carriers until the engaging elements are disengaged from theclamping collars, then extracting the engaging elements from their seatsand reversing them end for end. By this operation, the sides or cornersof the bars which before were at the underside or nearer the peripheryof the carriers, will be at the outer side or on the greater radius, andhence will be the corners or edges which will engage the lumber. Nothaving been subjectto wear when the opposite edges or corners were theactive ones, the edges or corners now active will be sharp and givetherollers the proper eliiciency. ln this fashion by simple reversal ofengaging elements or toothed bars, the roller may be provided with a newand sharp work surface, without entailing loss of time or expense insharpen Y ing or replacing the work engaging portions.

lt is obvious that with the engaging elements disposed in thisnon-radial position, their sloping ends will extend some distancecircumferentially across the undercut faces of the clamping collars. lnorder 'to increase the Contact surface between the ends of the engagingelements and the clamping collars, the sloping ends of the former aregiven a slightly rounded contour, as shown in Fig. 3, such contour beingthat which will follow the face of the clamping collar. Furthermore., asshown in Fig. 3, each end will be beveled in opposite directions at theproper angle so as to give increased contact surface.

rrlhe ends are Ybeveled in opposite directions from medial lineso' as'to 'provide contact".

the' carrier, and for' its reversed positionv above described. In Figs.5, 5a,

signed for use where a very sharp worlfing' surface is required, and; itwill be observed that instead of being simply serrated, the toothed edgeis beveled in a third'v direction,` forming pyramidal teeth ,having aflat front face and a sharp point. Toothed bars'of this form aredesigned for use inl rollers wherein the' engaging elements are disposedin either radial or non-radial position.l l form of toothed bar a mosteifec'tivefeeding engagement with the lumber is obtained, with theleastamount of scoring or marking on it by the bars.f The flat frontfaces on the teeth prevent their' breaking through the material, whilethe sharp points pierce' through the fiber without spl'intering" it andthe' rearwardly beveled portion clears the surface of the lumberr so 4asto'leavel n'oA mark. In the form illustrated in' Figs. 5 and: 5a therear' bevel is straight, whereas' in the form illustrated in Figs. 6 and61 the rear bevel is curved. i r

In Fig. 7 is shown a partial cross section of a roller in which bars ofthe form"illustrated in Figs. 5 to 6? inclusive are disposed innon-radial position.

project forwardly so as to .have a somewhat hooklike action as they meetthe lumber. This insures their taking a better grip on the lumber, andis of particular importance in operating upon heavy timbers and when thespeed of the feeding roller is high.

For use with soft lumber, it may not be desirable, and is not necessary,to form the engaging elements with the serrations or teeth, and in suchinstances, with my improved roller construction, simply a plain bar ofrectangular cross `section may be used efficiently. Due to thenon-radialsetting of the bar, it is not necessary to bevel its operating side downtol an edge in order to secure proper working engagement, as theslanting position of the bar in the carrier presents its rectangularcorner to the work in proper relationship to secure the effectiveyworking engagement necessary to feed the lumber. In this plain form ofbar, when one corner is worn down, the other corner may be brought intooperative position by simply reversing the bar as described above.

From the foregoing, it will be observed that my improved constructionprovides a feeding roller wherein the engaging elements are removablydisposed in such position as to best withstand the stresses to whichthey are subjected, and in which they are most etlicient in securing aneffective feeding operation.

v 6' and I haveshown two other 'forms of toothed bars. Theseare d'e-YWith this*- It will be observed' 'A that in such construction theworking points' ItA willv be observed, furthermore, that by virtue of'this4 construction, tlie'iwork vengaging. elements may be to allVeffects' renewed by simply reversingV them'- in their seats so asto-lpresent new' workingV portions. It;y is

thu'sobviou's that my improved' construct-iony provides a feeding',roller which isA bothevery very economical' l efficient in voperationand 1nI upkeep; y

I am aware' thatthe devices herein illustratedf and described aresusceptible' foff'urther'lch'angjes ancl^ji1iodifi`cations withoutdepartingfrom the spirit and scope of the inj venti'on' indicated yinthe following, claims. j

What' IAV claim' is:

l?. A feeding roller"incl`uding substantia'l'ly cylindrical carrier,said carriei1` being provided with longitudinal slots extendingtliereinto tangentially relativel to'.l a circle concentric therewith,longitudinally extending bars seated in said slots andi havingprojectingportions eirten'dingoutwardly beyond' f thek carrier and lpitchedin thedirection ofl rotation thereof, said projecting portionslbeing'formed-'with beveled rear` faces and with'flat front work engagingfaces adapted. toz 'engage ImaterialV to feed it with rotary soymovement of the carrier, and means for sef curing the, bars inthe slots.

2'. A feeding roller" including a revolubly mounted carrier, saidcarrier'being provided with longitudinalslots `about its peripheryextending into' the carrier tan'genti'ally relative' tol a circleconcentric with its axis, engaging elements in the form of barsreinovably mounted in said slots and having portions projecting frointhe carrier and beveled to form hook-like members pitched in thedirection of rotation of the roller and adapted to engage lumber to feedit with rotary movement of the carrier, and means cooperating with theextremities of the engaging elements to clamp them into the slots.

3. In a feeding roller, a vsubstantially cylindrical carrier mounted forrotative movement, engaging elements in the form of bars extendingvlongitudinally of said carrier and removably mounted therein so thattheyl eX- tend outwardly from the periphery of the carrier and arepitched in the direction of the latters rotation, whereby theirengagement with material when in operation tends to force them intotheir seats, the projecting lumber to feed it upon rotary movement of vthe carrier, and removable means coperatf substantially cylindricalcarrier, a longitu-k dinally extending bar seated therein and extendingfrom the periphery thereof tangentially relative to a circle concentricwith the carrier7 said bar having work engaging edges at the oppositesides thereof and being reversible in the carrier so as to disposeeither of said edges in operative position7 and means coperating withthe extremities of said bar for clamping itA in the carrier.

6. In a feed roller, the combination of a substantially cylindricalcarrier, a clamping collar longitudinally movable relative thereto7 andan engaging element in the form of a longitudinally extending bar seatedin the carrier and having its extremity extending beyond the end of thecarrier and curved for engagement with the clamping collar, by whichengagement the engaging element is clamped in its seat.

7. In a feed roller7 the combination of a cylindrical. carrier, aclamping collar having a rentrant clamping face, and an engaging elementseated in the carrier tangentially relative to a circle concentrictherewith and having its extremity extending beyond the end of thecarrier and beveled transversely Copies of this patent may be obtainedfor to afford surface Contact with the clamping face of the collar.

8. In a feeding roller, the combination of a substantially cylindricalcarrier, engaging elements 'seated therein and extending fromthe'periphery thereof pitched in the direction of rotation of theroller, said engaging elements having flat forward faces and theirrearward sides beveled in the direction in which said engaging elementsare pitched, the arrangement providing peripherally disposed hook-likemembers for engaging lumber to carry it forward upon rotation of theroller.

9. In a feeding roller, a work engaging element comprising a iat harhaving its operating edge formed by a longitudinal series of serrationsand a lateral bevel extending from the apices of the serrations at theyrearward side of the bar to provide sharp work engaging points alongthe margin of the bar and flat work feeding faces at the forward sidethereof.

In testimony whereof I hereunto affix my signature in the presence oftwo witnesses, this 21st day of October, 1915.

THOMAS A. COLEMAN.

Witnesses: y

IVI. I. SMITH, M. A. HANDEL.

ve cents each, by addressing the Gommissioner of Patents, Washington, D.C.

